Fuel Computer Issue...

AGLyme

I love flying!
Joined
Dec 8, 2018
Messages
24
New FD CTLSi (injected model). There is a "fuel flow sensor", but there are no sending units in the tanks.
The CTLSi has two wing tanks that feed to a single Header Tank, which then feeds to the engine. The fuel selector has Left, Right, or, "Both". The selector is always on "Both".

Returning from a flight yesterday (1.5 hours) and after turning Base, an audible warning sounded "Switch Tanks"

Before I set out, I put 10 gallons in the tanks, and entered this value into the "Fuel Computer Quantity Adjustment" field. The Dynon reading of fuel used (but only showing fuel as if it is only one tank, or put another way, the fuel on board is listed similarly like the photo in Figure 208 in the Manual), i.e. one value, not two (i.e. 2 fuel tanks). The Dynon fuel on board value was surprisingly close to the actual sticked values (Left sticked gals + Right sticked gals).

I referenced the Dynon Manual (page 6-6 March, '18 edition), and I would like to get to a "Preferences" page and create the actual plane environment, i.e. 2 tanks with each tank's value, and, have the ability to add gas for each tank. I don't know how to do that. Is there something I can do easily to reveal the 2 tanks? And I'd like to get rid of the "Switch Tanks" warning. I can see no reason why I would ever use either left or right, and, the plane has a header with a warning light if the header's gas level goes lower than the sensor which is at the highest point of the header.

Thank you in advance...
 

Dynon

Dynon Staff
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Jan 14, 2013
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14,232
Location
Woodinville, WA
Unfortunately not. The fuel computer only sees the entire aircraft's fuel as a single entity, as it does not know how to apportion it to individual tanks (it only knows flow, not where it's coming from). For separate tank measurements, you need to have in-tank senders.
 

AGLyme

I love flying!
Joined
Dec 8, 2018
Messages
24
Thank you for the reply. Would it be possible to:
switch off the "Change Tank" warning?

Appreciate the quick answer...
 
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